Improvement in magneto-electric machines



CARPENTER, Jr. MAGNETO ELECTRIC MACHINE.

N0. 14,598. Patented Apr. 8, 1856.

m: mums Fn'us co woroumu, wnsamawu. u. c

which the instrument is used cannct h UNITED STATES PATENT OFFICE.

CALVIN OARPENTER,,JR., OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT lN MAGNETO-ELECTRIC MACHlNES.

Specification forming part of Letters Patent No. 14,598, dateclApril 8, 1856.

To all whom it may concern:

- Be it known that I, CALVIN CARPENTER; J r., of the city and county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Medical Magneto-Electric Batteries; and I do hereby declare the following to be a full,.clear, and exact description thereof, reference being had to the accompanying drawings, in which- Figure l is a plan, Fig. 2 an elevation, of the movement.

The object cf my invention is to produce electric shocks from the combination of the magnet and helices in rapidsuccession for medical purpcses, the current from which shall flow in one direction, or in such manner as to keep, one cf the poles of "the battery permanently positive and the other permanently negative, which is not the case with ordinary magnete-electric medical batteries now in use. This is a very important element in the instrument for medical purpcses, without which the cperatcr cannet control the direction oi the iin eellin g forces er" the shocks in their application to the human early, and the prcper and desired eifect fer e TQI'G- riuced for the cure of disease.

Another requisite te he attainerl by this machine is the reguiaticn of the strength of the checks suficientiy to equal, at least in this ticnlar, the acid nieriicel battery, while it is superior in every other particular iihe constructien oi the machinery is as follows:

a represents the frame or" brass or other suitable metal,

b are the helices formed in the usual way, the two ceres of soft iren being surrcunrlerihy ceilsof insulateilccpper wire at such size and properties as is reomlrerlfor the strength cf current that may he rlesired,care being taken that it is suficiently strong fer all medical purposes i have found the following tc answer, the cares of soft iron being half an inch iii anieter, and of sufficient length to wind a coil of insulated wire thereon c1" twc inches in length and one and one-half inch in rliaineter or" No. 39 copper wire, which are aitlzerlin the usual way on an axis running in proper nearin gs in the frame. This axis has the polechanger 0 (similar in principle to the ordinary pole-changer) affixed to it; but the construc 'tion of this pole-changer c is such as to givea direct current in one direction, instead of the alternating currents of the common battery.

It will be seenin the detail drawings, Fig. 2, that the ivory ferrule c has two semicircular metal segments affixetl thereto, on which are cogs projecting outward and forming a spurwheel, 0 the two halves oi which are perfectly insulated from each other by the non-conducting ferrule of ivory or other proper material, by which means thegear becomes a pole changer. Two other cog-wheels, dd, gear into 0 one en each side. These wheels take the place of the crciinary springs, which in this ma chine are represented at w by blue lines, cuti omit therein constructing my machines. (They are rnerelyinserted for reference.) These wheels receive the current anrl transmit it in the manner as the springs from the helices,but wit" out wearing the surface of the pole-changers thcex'rentte which springs rle, thus making rncre riuraole curl less liable to becernefiilei on by the fricticn, which eften closes t'n circuit steps the action er" the apparatu until rema ned. The gearing thus arranged, the wheels c3 d" can he made smaller-then the enle-changeror not, pleasure, the number of breaks can he indefinitely increaseri and reeeaterl far beyond the speed at it would be preper tc receive the coils, means incre rleciriec'i results can he chtaine-zi withcut giving-the patient produced by ether batteries. l

is is effeceri by placing a p-i"'n1,f,- uncnthe axis cf the CO5 wheel ii, (which is sunpcrteri cr a frame, a", entirely insulate zl frees the ether parts of the machine by a ncn-conrluctcr between them 6,) and alight snring, 72 lying horizontahy er ctherwise ever the erism f, is struck glee as it revolves, thus mahin nurs her of rapid breaks, th shocks finer zncre agreeable.

The frame a connects with one cf the henrilee er pores, the main c with ether, sc that when the break-spring h, accrenauierl, is not in contact with the prism the current passes thrcugh the patient, and when it is in contact with the angles of sairl prism the current through the poles er hamllcs is broken, it being understood that the spring represents one pole and the prism the other of the short current, which, when closed, cuts off the long circuit through the patient.

As the current in this machine is in one (1ircetion it can be applied to electrotyping or depositing metals by removing the break-- spring out of contact with the prism.

' The magnet is the common U-maguet, but

in order to get a large-sized one into small compass I bend the twolegs at right-angles, as clearly shown in the plan, m being the magnet. At or near thisangle I hinge the magnet so that its poles can be made to approach or recede from the helices in the plane of revol ution of theirpole's, by which means I can determine with the greatest exactness the stren gt [1 of the shocks within the compass of the machine. To hear this magnet off'from the coils I place a flat spring, at, against the bend, which causes it to recede when left at liberty to do so. This action is counteracted and regulated by a setscrew or cam, 6,-that moves it up toward the helices. This screw should be coarse-threaded, so'that one turn will complete the range of movement. An index can then be attached to the screw with a scale permanently fixed so that it will mark the degree ofstrength of the shock to which the machine is set.

I am aware that machines have been made in which the magnet was made to slide to and from the coils, and I do-not'intend toclaim or cover that broad ground; but in this-case the ends of the magnet-were made to approach the coils, while iumine the side is brought up, giving the advantage of surface, and a more convenient and perfect mode of adjustment.

Having thus fully described the construc breaking the current, substantially in the manner and for the purposes set forth.

CALVIN CARPENTER, JR.

Witnesses SAML. COLMAN, G. G. WALKEB. 

